Means for transferring collars



Feb. 23, 1954 B, G, PRlCE 2,669,773

MEANS FOR TRANSFERRING COLLARS Feb. 23, 1954 B. G. PRICE MEANS FOR TRANSFERRING COLLARS 3 Sheets-Sheet 2 Filed April 16, 1951 Berry /enn Pr/Ce INVENTOR.

BY 'M ATTORNEY Feb. 23, 1954 B G, PRlCE 2,669,773

MEANS FOR TRANSFERRING COLLARS Filed April 16, 1951 5 Sheets-Sheet 5 5er/*y /enn fr/ce INVENTOR.

3117/@ 0f @JWM A 7' TOHNE Y Patented Feb. 23, 1954 UNITED :opriep cream Molins non TRANSFERBINQ ,Copinage muy Glem ,Ifrie Houston, 19X-, @pignon by 1.1125110 "a Sxgnments,

Harfe .Cpeetp'e a corp-WWW Pf Delaware Applica/@aa April 16, 1951, serial p9. 221er@ Contact between the ,arm `pipe `and fille .011' w''u casing, labus :inspiring longer life ifpl bQih ,the casing and alle `drill pipe it often 9201.11@ that the collars must be rernoyed ,ffromigliedrill pipe, bomma@ me rcollars must grip @he pipe Very rmly `dii-ring` drilling they are difficult-to Wremei/e :HG1-@mfom all means for removing @0ilars from `drill Spine-.have resulted `in damage io .apieniant percentage Aof Y, the ,proleptolsf-Fr-herefore, an object 0f @his 1p1/@nimm Ais 1.0 provide device .fpr `rernqvne protector `collars fromfcylndersfwmasgdrill pip(e :Wl'lehwill 110i damage lille ,y collars.

FA further @bieppfrthis:invention-fis,t0 provple a device of lthe ,type ldescribed which is easily portable arieli maybe use@ onpipe-in ,Meek with ap1.inirnilipfff `pipe-1l1a11plline.

Alrioigl'zer object; ,of r, this inventionV `is to `proyiole :device which: can be ,need 'i0 plaa-,Collars .Orl a givenfeylinleras welhas topremove cellars imm @ylinder Other ,objects `will `be v apparent ffrpmtpe .fol-

Owing @65.9111111011 Land accompanying drawings ffxrheep:

,-,liieure =1 tis a plein View ,pi thel nYeption ,prisifcgilecl'for removal of a collar from a piece of drill` pipe- Figure 2 is a plan View of the inventiondafiger it has beenvopcrateld?tolrnowiethe, collar,` ontol the cylindrical Jsleeve.

Y lf'igilrey, is anelevational viewf .the inven- Y,tion arid afsecizion Aof drill pipeflrositlionedfthereriistriirn Voda cone, or tapered `or conical sleeve, d*

which isa part of julie invention, in itsopenppsirion. ,,Figureaislaeide. elevational detail ofaioot airlfiiphlsialpepipfz ille. ini/'epilee Figure 5, is a/eectionuiaaken, alongA line iff-Elvin of push plate sleeves 28 and 29. The push plate sleeves 28 and 22 are slidably mounted on guide rods 3i] and 3l respectively. The guide rods 3G and 3i are secured to the front plate 2li in a position substantially parallel to the hydraulic cylinders and 22, and substantially parallel to the drill pipe II when it is in position. The push plate sleeves 28 and 29 are secured to the respective sides of the push plate I8. As hydraulic fluid is admitted through the valve 2t to the cylinders 2G and 22, the pistons move outward causing the push plate sleeves 28 and 2S to move the push plate IB. The push plate i8 in turn pushes the cylindrical sleeve It which pushes the conical sleeve I2.

It is apparent that the push plate i3 and the push plate sleeves 28 and 29 form a single structural unit.

Means for engaging the protector collar Iii on the side away from the conical sleeve I2 and the cylindrical sleeve it are provided. Such means may take the form of a back plate 35 on which a plurality of pushers or arms 3l are hingedly mounted. Four arms are used in the embodiment illustrated. As shown in Figure 4 the baci: plate 35 is provided with a slot to receive the pipe IE, and is connected to the guide rods 3S and 3i so that the front plate 2d, the two guide rods and 3i and the back plate 35 constitute a rigid structural unit and form a sort of box framework for the entire device.

Each of the arms 37 move in a plane containing the axis of the drill pipe I I and make a predetermined angle with the axis of the drill pipe when engaged with the surface thereof. rlhe size of this angle is important to the best operation of the invention and is preferably within the range of 20 to l0 degrees. The arms 3i may be resiliently urged against the drill pipe i5 by springs 39.

Feet di] are provided on the ends of the arms 37. The feet it must be constructed so as to avoid pinching the collar I as it pushes against the collar and the drill pipe II, and as it pushes against the collar and the cone I2. Preferably the face 42 and the base 44, sometimes referred to as a second face, of the feet I are surfaces of a block i6 of a material which is resilient, such as rubber, but which is somewhat less resilient than the collar I2 itself. Further the face 52 of the feet l2 is preferably substantially plane, and does not carry any protrusion designed to slide under the collar I9.

The curvature of the base 'i4 of the resilient block t6 may approximate the curvature of the drill pipe I I. Any rigid backing for the face preferably has a radius of curvature approximately equal to the radius of the cylindrical sleeve I4.

In the operation of the invention the cylindrical sleeve Id is slid over the end of the drill pipe I I nearly to the collar I@ which is to be removed. The split conical sleeve I2 is placed around the pipe Il and fitted against the cylindrical sleeve I4 between the cylindrical sleeve and the collar I. The framework comprising front plate 2li, the two guide rods 30 and 3l and the back plate is then lifted, together with the parts affixed thereto, and placed over the drill pipe in the position shown in Figure 1. Some external source (not shown) of hydraulic pressure is connected to the valve 26 which is opened to permit admission of hydraulic fluid to the cylinders 2S and 22.

As the pistons move down the cylinders 22 and 22 away 'from the front plate 2i, they push the push plate sleeves 26 and 29 which in turn move e il the push plate I3, causing the cylindrical sleeve ill and the conical sleeve I2 to move toward the back plate 35 and the feet de. The front and back plates are not fastened to the drill pipe II, so the back plate 33 and the push plate I8 both slide along the drill pipe I3 until the collar Iii is engaged by the feet iii on one side and by the edge of the cone I2 on the other. As the pistons move further, the feet il and the conical sleeve I2 squeeze the collar ii! between them until it slides over the conical sleeve I2 and onto the cylindrical sleeve I4. The conical sleeve I2 continues its motion toward the back plate 35 until the feet 4t have pushed the trailing edge of the collar Iii over the conical sleeve I2 and onto the cylindrical sleeve It.

Once the collar has been moved onto the cylindrical sleeve It, the framework is lifted off the pipe, the conical sleeve I2 is opened and removed from pipe, and the cylindrical sleeve I4 with the protector I is slid off the end of the pipe it.

It is apparent that once a collar It has been stretched onto a cylindrical sleeve I4, the cylindrical sleeve I2 and the conical sleeve I2 can be positioned on any cylinder Il of appropriate size and the collar l2 transferred to the new cylinder il. Further, a new collar .it may be placed around a piece of drill pipe II by commencing the operation with the collar I@ around a pipe or other cylinder of sufficiently small diameter that the collar lil does not have to be stretched to be placed in position.

if the cylindrical sleeve I i and conical sleeve I2 have a sumciently smooth surface, and if the surfaces thereof are lubricated with such a lubricant as soap before the collar is stretched, the collar it will slide down the conical sleeve I2 and off of the cylindrical sleeve ill without pushing. once the edge of the collar Ii) is moved over the end of the cylindrical sleeve Iii onto the conical sleeve I2. Those skilled in the art will rind it easy to move the collar 6 along the smo-oth and lubricated surface of the cylindrical sleeve 4 until the end of it is over the conical sleeve I2.

The device herein described has the advantages of being easily portable and usable on pipe in a rack. The careful selection of the angle which the arms 3l make with the drill pipe II and the shape and resiliency of the feet 40 along with other factors inherent in the construction of this invention insure against damage to collars to an extent not previously known in the industry. The device may be used not only to move protectors to or from drill pipe, but also to move any type of resilient collar to or from other cylindrical surfaces.

Many modifications maybe made in the invention as described herein without departure from the scope thereof. It is, therefore, apparent that this description is illustrative only and is not to be construed in any limiting sense.

I claim:

In a device for removing an expansible collar from a length of pipe, the combination or a conical sleeve with internal diameter substantially equivalent to the outside diameter oi said pipe and comprising two parts hingedly secured together whereby said conical sleeve may be placed around said pipe; a cylindrical sleeve with internal diameter greater than the maximum outside diameter of said pipe and with outside diarneter substantially equivalent to the maximum outside diameter of conical sleeve, said oy lindrical sleeve being movable over said pipe and being adapted to abut and cooperate with said conical sleeve while surrounding the pipe; a first structural unit comprising a push plate adapted to abut the second end of said cylindrical sleeve and having a U slot therein adapted to receive said pipe, together with a iirst push plate sleeve and a sec-ond push plate sleeve both secured to said push plate; a second structural unit comprising a rst guide rod passing through said first push plate sleeve and a second guide rod passing through said second push plate sleeve together with a front plate secured to one end of each of said guide rods and having a U slot therein adapted to receive said pipe and a back plate secured-to the other end of each of said guide rods and having a U slot therein adapted to receive said pipe; said structural units being adapted to sit loosely on said pipe and to slide easily thereon; a plurality of -arms With rst and second ends, said arms being hingedly mounted at said rst ends to said back plate so as to make an angle with the axis of said pipe within a predetermined range; a plurality of feet, one secured to the second end of each of said arms, said feet comprising a rst face adapted to engage said expansi'ble collar and a second face adapted to engage said pipe, conical sleeve and cylindrical sleeve, both of said faces being of resilient material and substantially free from any protrusion, and said feet being positioned between said back plate and said push plate and adapted to slide upon the surface of said pipe, conica1 sleeve and cylindrical sleeve While pushing against said expansible collar; means operable between said iirst structural unit and said second structural unit for causing said push plate sleeves, push plate, cylindrical sleeve and conical sleeve to move toward said feet; whereby said expansible collar may be squeezed between said feet and said conical sleeve and moved over said conical sleeve onto said cylindrical sleeve in one continuous single step operation.

BERRY GLENN PRICE.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 889,315 Kenyon June 2, 1908 2,252,692 Barnes et al Aug. 19, 1941 2,263,778 Howard Nov, 25, 1941 2,291,251 Norris July 28, 1942 2,320,553 Barnes et al June 1, 1943 2,327,088 Barnes Aug. 17, 1943 

